Cross table with interobserver agreements (Cohen κ) among 4 readers^{^a}

	Reader 1	Reader 2	Reader 3	Reader 4
Reader 1	–	0.72	0.74	0.70
Reader 2	0.72	–	0.69	0.64
Reader 3	0.74	0.69	–	0.85
Reader 4	0.70	0.64	0.85	–

Note:— indicates not applicable.
↵a The FHBA sign was classified using the coding “positive FHBA sign” versus “equivocal” and “negative FHBA sign.”